Isuzu KB P190. Manual — part 239

6B – 12 ENGINE COOLING

031R300003

5. Thermostat

Install the thermostat to the thermostat housing.

6. Water Outlet Pipe

1) Install the water outlet pipe with new gasket to the

thermostat housing.

2) Tighten the outlet pipe bolt to specified torque.

Outlet Pipe Bolt Torque

N·m(kg·m/lb ft)

19(1.9/14)

3) Connect the turbocharger-cooling pipe to outlet pipe.

7. Radiator Upper Hose

1) Connect the radiator upper hose to the water outlet

pipe.

2) The knob of clamp shall be dircted to holizonal side.

3) Replenish the engine coolant.

ENGINE COOLING 6B – 13

THERMOSTAT

REMOVAL AND INSTALLATION

Read this Section carefully before performing any removal and installation procedure. This Section gives you
important points as well as the order of operation. Be sure that you understand everything in this Section before you
begin.

Removal

1. Radiator Upper Hose

1) Partially drain the engine coolant.

2) Remove the radiator upper hose.

2. Water Outlet Pipe

3) Disconnect the turbocharger-cooling pipe from outlet

pipe.

4) Loosen the fixing bolt and remove the water outlet

bolt.

3. Thermostat

Remove the thermostat from the thermostat housing.

Take care not to damage the thermostat.

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Inspection and Repair

Make the necessary adjustments, repairs, and part
replacements if excessive wear or damage is discovered
during inspection.

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Operating Test of Thermostat

1. Completely submerge the thermostat in water.

2. Heat the water.

Stir the water constantly to avoid direct heat being
applied to the thermostat.

3. Check the thermostat initial opening temperature.

Thermostat Initial Opening Temperature

°C (°F)

82 (180)

4. Check the thermostat full opening temperature.

Thermostat Full Opening Temperature

°C (°F)

95 (203)

Valve Lift At Fully Open Position

mm (in)

9.5 (0.37)

6B – 14 ENGINE COOLING

c

Thermometer

d

Agitating rod

e

Wooden piece

Installation

1. Thermostat

Install the thermostat to the thermostat housing.

2. Water Outlet Pipe

3) Install the water outlet pipe with new gasket to the

thermostat housing.

4) Tighten the outlet pipe bolt to specified torque.

Outlet Pipe Bolt Torque

N·m(kg·m/lb ft)

19(1.9/14)

5) Connect the turbocharger-cooling pipe to outlet pipe.

031R300003

3. Radiator Upper Hose

1) Connect the radiator upper hose to the water outlet

pipe.

2) The knob of clamp shall be directed to holizonal side.

3) Replenish the engine coolant.

ENGINE COOLING 6B – 15

RADIATOR

REMOVAL AND INSTALLATION

Radiator and Associated Parts

RTW36BLF000101

Legend

1. Radiator Hose

2. Drain Plug

3. Fan Guide, Lower

4. Fan Guide

5. Bracket

6. Reserve Tank Hose

7. Reserve Tank

8. Radiator Cap

9. Radiator Assembly